◎ 题干
All his attention________on the computer game he was playing,so he even didn't notice his mother
enter the room.
[     ]
A. has been fixed
B. was fixing
C. was fixed  
D. fixed
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“All his attention________on the computer game he was playing,so he even didn't notice his motherenter the room. [ ]A. has been fixed B. was fixingC. was fix…”主要考查了你对  【一般过去时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。